In Minecraft, I have a graphical glitch where there are small purple and sometimes blue static squares all over my Minecraft screen. How could I fix this? They are roughly the size of the on-screen Minecraft blocks and they jitter left and right ect. and it makes it very hard to play.

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6

Do you have a screenshot showng the problem?
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alexanderpasOct 21 '10 at 11:40

I found out how to fix it on my computer. I changed my settings on my nVidia graphics card. There was a slider for performance vs. quality, I changed the options to "let 3D application decide" (the performance option had the same result) and the graphical problems went away. Hope this helps.

The new AMD 11.5 Driver does not work well with Minecraft. The problem stems from AMD Power Play which actively slows your GPU Clock speed down when not in use to conserve power and to lower heat. Now usually when entering a 3D game the clock speed is automatically adjusted to full allowing your game to take advantage of the GPUs full power. But in the case of 11.5 it does not and in some cases actually down clocks the GPU lower then it's original idle power play setting.

My recommendation would be to downgrade your AMD driver package back to 11.4 which is confirmed to be working.